
Abbott’s was a Baltimore brand of aromatic cocktail bitters, made until the 1950s; today’s bottles are recreations. Like other aromatic bitters, it is a concentrated spiced seasoning added in dashes.
A couple of dashes add warm, spiced bitterness, mostly to stirred drinks built on whiskey, gin or vermouth.
Recreated Abbott's (Tempus Fugit or Bob's)
The closest swap, dash for dash.
The usual stand-in, also dash for dash. The drink loses some of Abbott's nutmeg and cinnamon warmth.
Dash for dash, it makes the drink brighter and less warm.
Closed and out of the light, it keeps for years.